#include<stdio.h>
int main()
{
void swap(int *p1 , int *p2);

    int *p;
    int a,b;
    int *pointer1,*pointer2;
    pointer1=&a;
    pointer2=&b;

    printf("please enter a and b:");
    scanf("%d%d",&a,&b);
    if(a<b)
    swap(pointer1,pointer2);
    printf("max=%d,min=%d",a,b);

    return 0;
}
void swap(int *p1 , int *p2)
{
    int temp;
    temp=*p1;
    *p1=*p2;
    *p2=temp;
}